Мineral Powders Dispersion Degree Effect on the Properties of the Cementing Alkaline System

2021 ◽  
Vol 1017 ◽  
pp. 31-40
Author(s):  
Said Alvi Murtazaev ◽  
Magomed Mintsaev ◽  
Madina Salamanova ◽  
Zhambui Aymenov ◽  
Arbi Alaskhanov
Keyword(s):  
Raw Materials ◽  
Cement Industry ◽  
Normal Density ◽  
Unique Identifier ◽  
Federal Target Program ◽  
Setting Times ◽  
Dispersion Degree ◽  
Scientific Project ◽  
Grinding Time ◽  
Total Specific Surface Area

This paper presents the results of studies on mineral powders dispersion degree effect on the properties of alkaline cement-water paste where powders are of natural and technogenic origin. The change dependences between the total specific surface area and the duration of grinding have been studied, and the optimal grinding time for raw materials has been revealed. The developed formulations of cementing alkaline binders, with the use of mineral powders and wastes from the cement industry, are distinguished by short setting times and high consumption of alkaline grout to obtain a cement paste of normal density, which requires further research. And the obtained influence patterns of the degree of dispersion on the properties of the "mineral powder - Na2SiO3" binder will make it possible to create strong and durable artificial building composites competing with concretes based on Portland cement. The results presented in this article were obtained within the framework of studies on the implementation of scientific project No. 05. 607.21.0320. "Development of technology for new building composites based on clinkerless cement of alkaline activation using substandard natural and secondary raw materials" supported by the Federal Target Program "Research and Development in Priority Areas of Development of the Scientific and Technological Complex of Russia for 2014-2020". The unique identifier for the agreement is RFMTFI60719X0320.

Recipes and Properties of Multicomponent Systems "Aspiration Dust - Mineral Powder - Na2SiO3"

2021 ◽  
Vol 1017 ◽  
pp. 143-152
Author(s):  
Madina Salamanova ◽  
Said Alvi Murtazaev ◽  
Dena Bataev ◽  
Magomed Nakhaev ◽  
Bakhytzhan Sarsenbayev
Keyword(s):  
Raw Materials ◽  
Resource Saving ◽  
Unique Identifier ◽  
Federal Target Program ◽  
Alkaline Activation ◽  
Technological Complex ◽  
Target Program ◽  
Scientific Project ◽  
Energy Saving Technology ◽  
Mineral Powder

The paper presents the results of studies of the effect of the concentration of binder components on the properties of cement alkaline stone. Formulations of clinker-free binders of alkaline activation with the level of filling the system of 20 and 40% have been developed, the properties of the cement paste of the binding binder "aspiration dust - mineral powder - liquid glass" have been studied, the dynamics of a set of strength indicators has been studied, both for bending and compressive forces. The received results allow to estimate uniqueness of properties of a binding binder "a mineral powder - Na2SiO3" and to create new materials on resource saving and energy saving technology. The results presented in this article were obtained within the framework of studies on the implementation of scientific project No. 05. 607.21.0320. "Development of technology for new building composites based on clinkerless cement of alkaline activation using substandard natural and secondary raw materials" supported by the Federal Target Program "Research and Development in Priority Areas of Development of the Scientific and Technological Complex of Russia for 2014-2020". The unique identifier for the agreement is RFMTFI60719X0320.

Recipes of Knitting Systems Alkaline Activation Using Natural Raw Materials of the Chechen Republic

2020 ◽  
Vol 1011 ◽  
pp. 1-7
Author(s):  
Madina Salamanova ◽  
Dena Bataev ◽  
Aminat Uzayeva ◽  
Zurab Gacayev
Keyword(s):  
Raw Materials ◽  
Practical Importance ◽  
Cement Stone ◽  
Russian Science ◽  
Unique Identifier ◽  
Federal Target Program ◽  
Energy Consuming ◽  
Scientific Project ◽  
Alkaline Activator ◽  
Theoretical Foundations

The alkaline clinker-free binders formulations activation development based on fine powders of aluminosilicate nature will allow to obtain the effective building composites. The paper reveals the issues related to the theoretical foundations of the cement stone structure and strength formation based on the alkaline activator. The research results, in our opinion, are undoubtedly of practical importance for the construction industry, since the proposed recipes for clinker-free cements will replace the expensive and energy-consuming Portland cement, allowing to create strong and durable concrete and reinforced concrete structures. The results presented in this article have been obtained in the framework of research on the implementation of scientific project No. 05. 607.21.0320. “Development of technology for new building composites on clinker-free alkaline binders using substandard natural and secondary raw materials” which received support from the federal target program “Research and Development in Priority Directions for the Development of the Russian Science and Technology Complex for 2014-2020”. The unique identifier for the agreement is RFMTFI60719X0320.

Structural Formation of a Clinkless Cement Binding Alkali Battery with Thermoactived Margel

2020 ◽  
Vol 1011 ◽  
pp. 8-13
Author(s):  
Madina Salamanova ◽  
S-A. Murtazayev ◽  
A. Alaskhanov ◽  
Zurab Gacayev
Keyword(s):  
Building Materials ◽  
Raw Materials ◽  
Scientific School ◽  
Russian Science ◽  
Resource Saving ◽  
Resource Potential ◽  
Structural Formation ◽  
Federal Target Program ◽  
Energy Consuming ◽  
Scientific Project

Currently, construction volumes around the world are growing rapidly. Because of this fact the anthropogenic load on the natural resource potential of our planet is increasing, so special attention is paid to the development of less resource and energy-consuming technologies for building production, the development of new building composites based on the use of local secondary and substandard raw materials, the receipt of which high-temperature and expensive processing is not required. In this regard, the Grozny Scientific School of Energy and Resource Saving in the production of modern building materials has carried out the comprehensive studies to study the effectiveness of clinker-free alkaline binders as an alternative to traditional cement binders. The results presented in this article were obtained in the framework of the research on the implementation of scientific project No. 05. 607.21.0320. “Development of technology for new building composites on clinkerless alkaline binders using substandard natural and secondary raw materials” that received support from the federal target program “Research and Development in Priority Directions for the Development of the Russian Science and Technology Complex for 2014-2020”. Unique Agreement Identifier RFMTFI60719X0320

scholarly journals REGIONAL TECHNOLOGICAL LEARNING IN TURKISH CEMENT INDUSTRY

2020 ◽  
Vol 8 (4) ◽  
pp. 204-216
Author(s):  
Gurkan Calmasur ◽  
◽  
Meryem Emre Aysin ◽  
Keyword(s):  
Learning Curve ◽  
Linear Models ◽  
Raw Materials ◽  
Analysis Data ◽  
Vital Role ◽  
Learning Curves ◽  
Cement Industry ◽  
Company Performance ◽  
Technological Learning ◽  
The Impact

The learning curve reflects the reduction in average costs as the company's cumulative production increases. These curves are utilized when measuring company performance, managing production processes, and planning. In terms of cost reduction and profitability, the impact of learning is particularly important. The learning curves have been traditionally used in industries. In this study, the learning curves concerning the cement industry are examined. The cement sector inherits a high export potential in Turkey. Additionally, it is the industry branch that supplies the raw materials needed by countries' construction industries. On the other hand, the construction sector is a leading sector that mobilizes other markets. This sector is a major contributor to production, investment, and employment and plays a vital role in the development of the country. This paper aims to make a detailed analysis of the learning curves regarding the Turkish cement industry at the regional level covering the 2000-2018 period. In order to realize this aim, the linear and cubic learning models have been applied and the technological learning values for regions from 2000 to 2018 have been calculated. For the analysis, data of 68 factories operating in the Turkish cement industry obtained from Turkey Cement Manufacturers' Association have been used. The estimated results suggest that cubic models explain technological learning better than the linear models. The results indicated that learning levels differed across regions and times. While the highest learning level was observed in 2004, the highest level of forgetting was recorded in 2018. Finally, we can state that the learning curve of the Turkish cement industry between 2000 and 2018 is convex.

scholarly journals A Life-Cycle Approach to Integrate Environmental and Mechanical Properties of Blended Cements Containing Seashell Powder

2021 ◽  
Vol 13 (23) ◽  
pp. 13120
Author(s):  
Fatemeh Soltanzadeh ◽  
Ali E. Behbahani ◽  
Eduardo N. B. Pereira ◽  
Carlos A. Teixeira
Keyword(s):  
Life Cycle ◽  
Carbon Dioxide Emissions ◽  
Mechanical Performance ◽  
Raw Materials ◽  
Blended Cement ◽  
Cement Industry ◽  
Optimal Dosage ◽  
Life Cycle Approach ◽  
Natural Pozzolan ◽  
Cement Production

The adverse consequences of producing ordinary Portland cement (OPC) on the environment have introduced cement production as the fourth largest source of anthropogenic carbon emissions after petroleum, coal, and natural gas. Managing and reducing the environmental concerns regarding the impacts of cement production on the environment, namely the depletion of non-renewable fuel resources, consumption of natural raw materials, and releasing huge amounts of CO2 into the atmosphere should be, therefore, one of the key priorities of the cement industry. Application of locally available minerals and wastes that can be blended with OPC as a substitute could considerably reduce the environmental impact. The present study evaluates the potentiality of waste seashell to be used as an additive in the production of blended cement through a modified life cycle approach integrating environmental and mechanical performances. In this regard, 34 cements consisting of different blends of OPC, seashell powder (within the range of 4–30% by OPC mass), and natural pozzolan (up to 30% by OPC mass) were tested to identify the optimal dosage of OPC substitution. Environmental impacts of the cements were assessed through life-cycle analysis. The possibility of mitigating the carbon dioxide emissions in the production of cements, with similar mechanical performance compared to that of OPC, was evaluated by considering both the mechanical and environmental results. The outcome of this study introduced more environment-friendly and sustainable options for future cements.

scholarly journals Geochemical And Mineralogical Assessment Of Secondary Gypsum In Al-Najaf, Iraq And Employment As Raw Material For Cement Industry

2021 ◽  
Vol 72 ◽  
pp. 215-222
Author(s):  
Mohanad R.A. Al-Owaidi ◽  
◽  
Mohammed L. Hussein ◽  
Ruaa Issa Muslim ◽  
◽  
...  
Keyword(s):  
Portland Cement ◽  
Raw Materials ◽  
Chemical Properties ◽  
Quality Standard ◽  
Cement Industry ◽  
Raw Material ◽  
Insoluble Residue ◽  
Mineralogical Study ◽  
The Mean ◽  
Industry Success

The Portland cement industry is one of the strategic industries in any country. The basis of an industry success is the availability of raw materials and, the low extraction in addition to transportation costs. The Bahr Al-Najaf region is abundant with limestone rocks but lacks primary gypsum. An investigation had been carried out to identify the source of secondary gypsum as an alternative to primary gypsum. Twelve boreholes were drilled for a depth of 2 m, as the thickness of suitable secondary gypsum layer ranges from 1 to 1.5 m. The mineralogical study revealed the predominance of gypsum followed by quartz and calcite, with an average of 62.9%, 19.6% and 14.35%, respectively. The geochemical analysis revealed that the content of SO3 is appropriate and ranging from 41.92% to 32.89% with an average of 37.73%. The SO3 content is within an acceptable range. The mean abundance of the major oxides of the study area may be arranged as SO3 > CaO> SiO2> MgO> Al2O> Fe2O3. The insoluble residue was at an acceptable rate. The laboratory experiments for milling secondary gypsum with clinker has successfully proven the production of Portland cement that matches the limits of the Iraqi Quality Standard (IQS) No. 5 of 1984. Great care must be taken when using secondary gypsum; secondary gypsum must be mixed well to maintain the chemical properties before blending with clinker and utilizing in the cement mill in the cement plant.

A systematic literature review on green manufacturing concepts in cement industries

2017 ◽  
Vol 34 (1) ◽  
pp. 68-90 ◽  
Author(s):  
Sanjeev Shrivastava ◽  
Shrivastava R.L.
Keyword(s):  
Manufacturing Systems ◽  
Industrial Ecology ◽  
Raw Materials ◽  
Green Manufacturing ◽  
Green Technology ◽  
Cement Industry ◽  
Content Type ◽  
Technical Performance ◽  
Cement Manufacturing ◽  
The Impact

Purpose The purpose of this paper is to survey the technical performance of the cement industry including those related to procedures; groundwork of raw materials, fuels and semi-finished products for processing; accessibility of machinery, plant and equipment for various operations; arrangement and process control management. Design/methodology/approach A broad range of survey and research was reviewed, and all revealed the methods to recognize the key influences for development of green technology. The study explores the present scenario of green manufacturing (GM) strategies of Indian cement companies and provides the industrial ecology, ways of reducing energy consumption, environmental impact data collection, design and control of manufacturing systems and integration of product and manufacturing system. It also reveals the problems in decision-making systems owing to the impact of the green product design. Here, in this paper, all information is obtained by the medium of internet, journals, articles, and magazines. Findings This paper describes a problem of global warming, gas, water and other wastages emissions at the time of cement manufacturing and put forward a path that enables decision makers to assess the perception of GM in their organization and in prioritizing GM efforts. Originality/value This perspective survey is to provide an integrative outlook of performance methods for GM practices in the Indian cement industries. It gives important information, which expectantly will help in cement industry to adopt GM practices. This paper fills the gap in the literature on identification, establishment, and validation of performance measures of GM for Indian cement industries.

The Influence of Raw Meal Granulometry on the Formation and Properties of Clinker

2019 ◽  
Vol 296 ◽  
pp. 9-14
Author(s):  
Theodor Staněk
Keyword(s):  
Raw Materials ◽  
Formation Rate ◽  
Cement Industry ◽  
Technological Parameters ◽  
Short Term ◽  
Cement Production ◽  
New Energy ◽  
Energetic Demand ◽  
Important Branch

Cement production belongs to the most important branch of industry. It is marked out by processing of great quantity of natural raw materials and of considerable energetic demand. Not only the intensification of the contemporary production processes is the permanent effort of the cement industry, but also the search for new energy less demanding methods. The paper is focused on one of the most important components of the intensification of cement production – on the preparation of raw meal. It mainly deals with the influence of granulometry and microhomogeneity of the input raw materials on the quality and economy of the process of production and on the final product. The study was carried out mainly by methods of optical microscopy and the determination of technological parameters of cements. It has been found that a change in granulometry of raw meal has a significant impact on the formation rate of the clinker phases. Subsequently, the grindability of the clinker and the strength of the cement are influenced, especially in the short-term hydration. Change of granulometry and homogeneity of raw meal can greatly optimize the quality and economy of the cement production process.

scholarly journals A Systematic Approach to Calculate Unit Emergy Values of Cement Manufacturing in China Using Consumption Quota of Dry and Wet Raw Materials

Buildings ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 128
Author(s):  
Junxue Zhang ◽  
Ravi S. Srinivasan ◽  
Changhai Peng
Keyword(s):  
Environmental Impact ◽  
Systematic Approach ◽  
Raw Materials ◽  
Research Work ◽  
Cement Industry ◽  
Emergy Analysis ◽  
Destructive Effect ◽  
Materials Used ◽  
Cement Manufacturing ◽  
Work Done

The Chinese cement industry produced 2150 million metric tons of cement in 2014, accounting for 58.1% of the world’s total. This industry has a hugely destructive effect on the environment owing to its pollution. The environmental impact of cement manufacturing is a major concern for China. Although researchers have attempted to estimate impacts using life cycle assessment approaches, it lacks the ability to provide a holistic evaluation of the impacts on the environment. Emergy analysis, through ecological accounting, offers environmental decision making using elaborate book keeping. In spite of the high environmental impact of the cement industry, there has only been a handful of research work done to compute the unit emergy values (UEVs) of cement manufacturing in China. A thorough study of existing UEVs of cement manufacturing in China showed pitfalls that may lead to inaccurate estimations if used in emergy analysis. There is a strong need for a new, updated UEV for cement manufacturing in China, particularly reflecting both the dry and wet raw materials in the manufacturing process. This paper develops a methodology to calculate the nonrenewable resources used in cement manufacturing, particularly using mainstream cement production line. Our systematic approach-based UEV estimates of cement manufacturing in China using the quota method are 2.56 × 1012 sej/kg (wet material) and 2.46 × 1012 sej/kg (dry material). Emergy indicators such as environmental loading ratios which were calculated at 2390 (wet material) and 2300 (dry material); emergy yield ratios at 15.7 and 15.8; and emergy sustainability indices at 0.0066 and 0.0069 for dry and wet materials used in cement manufacturing, respectively; these show the immense impact on the environment in China.

Measures to Reduce Carbon Dioxide Emission of China Cement Industry

2011 ◽  
Vol 233-235 ◽  
pp. 412-415 ◽  
Author(s):  
Li Xia Hao ◽  
Feng Qing Zhao ◽  
Peng Xiang Zhao
Keyword(s):  
Carbon Dioxide ◽  
Raw Materials ◽  
Carbon Dioxide Emission ◽  
Cement Industry ◽  
Oxide Content ◽  
Low Carbon ◽  
Dry Process ◽  
Implementation Approach ◽  
Concentration Degree ◽  
Reduce Carbon Dioxide

Cement industry bear the brunt in the tide of resisting global warming because of large carbon dioxide emission. Five low-carbon measures and implementation approach to Chinese cement industry was put forward: Increasing industrial concentration degree and developing new dry process cement; Processing waste in cement kilns and reducing the use of raw materials and fuels; Increasing the amount of admixture in cement; Producing cement from calcium oxide content solid waste; Taking energy-saving measures such as cogeneration and grinding technology.

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